Notes. Observed σ_los and estimated masses of UFDs. Col. 1 lists the UFDs considered in this work. Col. 2 indicates the number of stars used to infer the σ_los for each galaxy. Col. 3 shows the semi-major axis projected half-light radius. Col. 4 lists the values for σ_los reported in literature. Col. 5 and Col. 6 indicate the observed σ_los and the estimated mass using Eq. (3) neglecting the effect of binaries. Col. 7 and Col. 8 the observed σ_los and estimated mass assuming a flat prior on f. Col. 9 and Col. 10 list both parameters, assuming f = 0.7. Col. 11 shows whether the dominant component of the dataset is composed of RGB or MS stars. Col. 12 indicates the DM annihilation J-factor computed using M(f). Finally, Col. 13 lists the references the v_los data was taken from; the numbers indicate 1. Koposov et al. (2011), 2. Li et al. (2018), 3. Caldwell et al. (2017), 4. Simon et al. (2024), 5. Koposov et al. (2018), 6. Jenkins et al. (2021), 7. Koposov et al. (2015b), 8. Longeard et al. (2021), 9. Simon et al. (2011), 10. Smith et al. (2024) and 11. Willman et al. (2011). For a_1/2, ellipticity and modulus distance used to compute R_1/2 in physical units, the values for UNIONS I were taken from Simon et al. (2024), while the rest are from Battaglia et al. (2022).

[a] For Eridanus III the value shown for the literature is the upper value for a 90% confidence. To see the comparison with this particular value, see Appendix B.

[b] The reason why this value is different with respect to the literature can be found in Appendix B. In the same appendix all the differences in the analysis with respect to original works are described for all the galaxies.